#include<ncurses.h>
#include<sys/types.h>
#include<sys/wait.h>
#include<signal.h>
#include<string.h>

WINDOW *create_newwin(int height, int width, int starty, int startx);
void destroy_win(WINDOW *local_win);
int main(int argc, char *argv[])
{ WINDOW *my_win;
int startx, starty, width, height;
int ch;
initscr(); /* Start curses mode */
cbreak(); /* Line buffering disabled, Pass on
* everty thing to me */
keypad(stdscr, TRUE); /* I need that nifty F1 */
height = 3;
width = 10;
starty = (LINES - height) / 2; /* Calculating for a center placement */
startx = (COLS - width) / 2; /* of the window */
printw("Press F1 to exit");
refresh();
my_win = create_newwin(height, width, starty, startx);

while((ch = getch()) != KEY_F(1))
{ switch(ch)
{ case KEY_LEFT:
destroy_win(my_win);
my_win = create_newwin(height, width, starty,--startx);
break;
case KEY_RIGHT:
destroy_win(my_win);
my_win = create_newwin(height, width, starty,++startx);
break;
case KEY_UP:
destroy_win(my_win);
my_win = create_newwin(height, width, --starty,startx);
break;
case KEY_DOWN:
destroy_win(my_win);
my_win = create_newwin(height, width, ++starty,startx);
break;
}
}
endwin(); /* End curses mode */
return 0;
}

WINDOW *create_newwin(int height, int width, int starty, int startx)
{ WINDOW *local_win;
local_win = newwin(height, width, starty, startx);
box(local_win, 0 , 0); /* 0, 0 gives default characters
* for the vertical and horizontal
* * lines */
wrefresh(local_win); /* Show that box */
return local_win;
}

void destroy_win(WINDOW *local_win)
{
/* box(local_win, ' ', ' '); : This won't produce the desired
 * * result of erasing the window. It will leave it's four corners
 * * and so an ugly remnant of window.
 * */
wborder(local_win, ' ', ' ', ' ',' ',' ',' ',' ',' ');
/* The parameters taken are
 * * 1. win: the window on which to operate
 * * 2. ls: character to be used for the left side of the window
 * * 3. rs: character to be used for the right side of the window
 * * 4. ts: character to be used for the top side of the window
 * * 5. bs: character to be used for the bottom side of the window
 * * 6. tl: character to be used for the top left corner of the window
 * * 7. tr: character to be used for the top right corner of the window
 * * 8. bl: character to be used for the bottom left corner of the window
 * * 9. br: character to be used for the bottom right corner of the window
 * */
wrefresh(local_win);
delwin(local_win);
}
